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Vertical localization parameters in ETKF (L2) - #729

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metdyn merged 9 commits into
feature/ygyu/pr_getkf_2stepsfrom
feature/ygyu/vert_localization
Aug 6, 2026
Merged

Vertical localization parameters in ETKF (L2) #729
metdyn merged 9 commits into
feature/ygyu/pr_getkf_2stepsfrom
feature/ygyu/vert_localization

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@metdyn

@metdyn metdyn commented Mar 10, 2026

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Description

This PR is to be merged to #692.
Add input parameters to set values in ETKF vertical localization:

  • vertical_localization_lengthscale: 11
  • vertical_localization_unit: logP / levels
  • vertical_localization_frac_retained_variance: 0.95

These parameter knobs have been tested on Discover.

Dependencies

Impact

Tuning parameters are useful for localEnsembleDA study

@metdyn
metdyn requested a review from rtodling March 10, 2026 16:22
@metdyn
metdyn requested a review from Dooruk March 13, 2026 15:25
@metdyn

metdyn commented Aug 6, 2026

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@Dooruk,

This PR needs to be merged, as infrastructure for GETKF.
It is needed to test new OOPS PR.
These parameters are tunable and experimental.
They affect local ensemble DA and there is no effect on VARs.

horizontal_resolution = template_dict['horizontal_resolution']

background_ensemble = {
'date': template_dict['window_begin_iso'],

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I will change this back. The time window is tricky for the ensemble part because of the time stamp on the ebkg file names themselves.

Comment on lines 360 to +361
vertical_localization_lengthscale:
default_value: 4
default_value: 2

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This length scale is from the GC99 function and its final values are set in suite/config file.

   'date': template_dict['window_begin_iso'],
@metdyn
metdyn merged commit bd50e75 into feature/ygyu/pr_getkf_2steps Aug 6, 2026
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@Dooruk
Dooruk deleted the feature/ygyu/vert_localization branch August 6, 2026 15:01
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